2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
9 #include "parse-options.h"
11 #ifndef DEFAULT_GIT_TEMPLATE_DIR
12 #define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
15 #ifdef NO_TRUSTABLE_FILEMODE
16 #define TEST_FILEMODE 0
18 #define TEST_FILEMODE 1
21 static int init_is_bare_repository = 0;
22 static int init_shared_repository = -1;
24 static void safe_create_dir(const char *dir, int share)
26 if (mkdir(dir, 0777) < 0) {
27 if (errno != EEXIST) {
32 else if (share && adjust_shared_perm(dir))
33 die("Could not make %s writable by group", dir);
36 static void copy_templates_1(char *path, int baselen,
37 char *template, int template_baselen,
42 /* Note: if ".git/hooks" file exists in the repository being
43 * re-initialized, /etc/core-git/templates/hooks/update would
44 * cause "git init" to fail here. I think this is sane but
45 * it means that the set of templates we ship by default, along
46 * with the way the namespace under .git/ is organized, should
47 * be really carefully chosen.
49 safe_create_dir(path, 1);
50 while ((de = readdir(dir)) != NULL) {
51 struct stat st_git, st_template;
55 if (de->d_name[0] == '.')
57 namelen = strlen(de->d_name);
58 if ((PATH_MAX <= baselen + namelen) ||
59 (PATH_MAX <= template_baselen + namelen))
60 die("insanely long template name %s", de->d_name);
61 memcpy(path + baselen, de->d_name, namelen+1);
62 memcpy(template + template_baselen, de->d_name, namelen+1);
63 if (lstat(path, &st_git)) {
65 die_errno("cannot stat '%s'", path);
70 if (lstat(template, &st_template))
71 die_errno("cannot stat template '%s'", template);
73 if (S_ISDIR(st_template.st_mode)) {
74 DIR *subdir = opendir(template);
75 int baselen_sub = baselen + namelen;
76 int template_baselen_sub = template_baselen + namelen;
78 die_errno("cannot opendir '%s'", template);
80 template[template_baselen_sub++] = '/';
82 template[template_baselen_sub] = 0;
83 copy_templates_1(path, baselen_sub,
84 template, template_baselen_sub,
90 else if (S_ISLNK(st_template.st_mode)) {
93 len = readlink(template, lnk, sizeof(lnk));
95 die_errno("cannot readlink '%s'", template);
96 if (sizeof(lnk) <= len)
97 die("insanely long symlink %s", template);
99 if (symlink(lnk, path))
100 die_errno("cannot symlink '%s' '%s'", lnk, path);
102 else if (S_ISREG(st_template.st_mode)) {
103 if (copy_file(path, template, st_template.st_mode))
104 die_errno("cannot copy '%s' to '%s'", template,
108 error("ignoring template %s", template);
112 static void copy_templates(const char *template_dir)
115 char template_path[PATH_MAX];
118 const char *git_dir = get_git_dir();
119 int len = strlen(git_dir);
122 template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT);
124 template_dir = system_path(DEFAULT_GIT_TEMPLATE_DIR);
125 if (!template_dir[0])
127 template_len = strlen(template_dir);
128 if (PATH_MAX <= (template_len+strlen("/config")))
129 die("insanely long template path %s", template_dir);
130 strcpy(template_path, template_dir);
131 if (template_path[template_len-1] != '/') {
132 template_path[template_len++] = '/';
133 template_path[template_len] = 0;
135 dir = opendir(template_path);
137 warning("templates not found %s", template_dir);
141 /* Make sure that template is from the correct vintage */
142 strcpy(template_path + template_len, "config");
143 repository_format_version = 0;
144 git_config_from_file(check_repository_format_version,
145 template_path, NULL);
146 template_path[template_len] = 0;
148 if (repository_format_version &&
149 repository_format_version != GIT_REPO_VERSION) {
150 warning("not copying templates of "
151 "a wrong format version %d from '%s'",
152 repository_format_version,
158 memcpy(path, git_dir, len);
159 if (len && path[len - 1] != '/')
162 copy_templates_1(path, len,
163 template_path, template_len,
168 static int create_default_files(const char *template_path)
170 const char *git_dir = get_git_dir();
171 unsigned len = strlen(git_dir);
172 static char path[PATH_MAX];
174 char repo_version_string[10];
179 if (len > sizeof(path)-50)
180 die("insane git directory %s", git_dir);
181 memcpy(path, git_dir, len);
183 if (len && path[len-1] != '/')
187 * Create .git/refs/{heads,tags}
189 safe_create_dir(git_path("refs"), 1);
190 safe_create_dir(git_path("refs/heads"), 1);
191 safe_create_dir(git_path("refs/tags"), 1);
193 /* First copy the templates -- we might have the default
194 * config file there, in which case we would want to read
195 * from it after installing.
197 copy_templates(template_path);
199 git_config(git_default_config, NULL);
200 is_bare_repository_cfg = init_is_bare_repository;
202 /* reading existing config may have overwrote it */
203 if (init_shared_repository != -1)
204 shared_repository = init_shared_repository;
207 * We would have created the above under user's umask -- under
208 * shared-repository settings, we would need to fix them up.
210 if (shared_repository) {
211 adjust_shared_perm(get_git_dir());
212 adjust_shared_perm(git_path("refs"));
213 adjust_shared_perm(git_path("refs/heads"));
214 adjust_shared_perm(git_path("refs/tags"));
218 * Create the default symlink from ".git/HEAD" to the "master"
219 * branch, if it does not exist yet.
221 strcpy(path + len, "HEAD");
222 reinit = (!access(path, R_OK)
223 || readlink(path, junk, sizeof(junk)-1) != -1);
225 if (create_symref("HEAD", "refs/heads/master", NULL) < 0)
229 /* This forces creation of new config file */
230 sprintf(repo_version_string, "%d", GIT_REPO_VERSION);
231 git_config_set("core.repositoryformatversion", repo_version_string);
234 strcpy(path + len, "config");
236 /* Check filemode trustability */
237 filemode = TEST_FILEMODE;
238 if (TEST_FILEMODE && !lstat(path, &st1)) {
240 filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
241 !lstat(path, &st2) &&
242 st1.st_mode != st2.st_mode);
244 git_config_set("core.filemode", filemode ? "true" : "false");
246 if (is_bare_repository())
247 git_config_set("core.bare", "true");
249 const char *work_tree = get_git_work_tree();
250 git_config_set("core.bare", "false");
251 /* allow template config file to override the default */
252 if (log_all_ref_updates == -1)
253 git_config_set("core.logallrefupdates", "true");
254 if (prefixcmp(git_dir, work_tree) ||
255 strcmp(git_dir + strlen(work_tree), "/.git")) {
256 git_config_set("core.worktree", work_tree);
261 /* Check if symlink is supported in the work tree */
263 strcpy(path + len, "tXXXXXX");
264 if (!close(xmkstemp(path)) &&
266 !symlink("testing", path) &&
267 !lstat(path, &st1) &&
268 S_ISLNK(st1.st_mode))
269 unlink(path); /* good */
271 git_config_set("core.symlinks", "false");
273 /* Check if the filesystem is case-insensitive */
275 strcpy(path + len, "CoNfIg");
276 if (!access(path, F_OK))
277 git_config_set("core.ignorecase", "true");
283 int init_db(const char *template_dir, unsigned int flags)
285 const char *sha1_dir;
289 safe_create_dir(get_git_dir(), 0);
291 init_is_bare_repository = is_bare_repository();
293 /* Check to see if the repository version is right.
294 * Note that a newly created repository does not have
295 * config file, so this will not fail. What we are catching
296 * is an attempt to reinitialize new repository with an old tool.
298 check_repository_format();
300 reinit = create_default_files(template_dir);
302 sha1_dir = get_object_directory();
303 len = strlen(sha1_dir);
304 path = xmalloc(len + 40);
305 memcpy(path, sha1_dir, len);
307 safe_create_dir(sha1_dir, 1);
308 strcpy(path+len, "/pack");
309 safe_create_dir(path, 1);
310 strcpy(path+len, "/info");
311 safe_create_dir(path, 1);
313 if (shared_repository) {
315 /* We do not spell "group" and such, so that
316 * the configuration can be read by older version
317 * of git. Note, we use octal numbers for new share modes,
318 * and compatibility values for PERM_GROUP and
321 if (shared_repository < 0)
322 /* force to the mode value */
323 sprintf(buf, "0%o", -shared_repository);
324 else if (shared_repository == PERM_GROUP)
325 sprintf(buf, "%d", OLD_PERM_GROUP);
326 else if (shared_repository == PERM_EVERYBODY)
327 sprintf(buf, "%d", OLD_PERM_EVERYBODY);
330 git_config_set("core.sharedrepository", buf);
331 git_config_set("receive.denyNonFastforwards", "true");
334 if (!(flags & INIT_DB_QUIET)) {
335 const char *git_dir = get_git_dir();
336 int len = strlen(git_dir);
337 printf("%s%s Git repository in %s%s\n",
338 reinit ? "Reinitialized existing" : "Initialized empty",
339 shared_repository ? " shared" : "",
340 git_dir, len && git_dir[len-1] != '/' ? "/" : "");
346 static int guess_repository_type(const char *git_dir)
352 * "GIT_DIR=. git init" is always bare.
353 * "GIT_DIR=`pwd` git init" too.
355 if (!strcmp(".", git_dir))
357 if (!getcwd(cwd, sizeof(cwd)))
358 die_errno("cannot tell cwd");
359 if (!strcmp(git_dir, cwd))
362 * "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
364 if (!strcmp(git_dir, ".git"))
366 slash = strrchr(git_dir, '/');
367 if (slash && !strcmp(slash, "/.git"))
371 * Otherwise it is often bare. At this point
372 * we are just guessing.
377 static int shared_callback(const struct option *opt, const char *arg, int unset)
379 *((int *) opt->value) = (arg) ? git_config_perm("arg", arg) : PERM_GROUP;
383 static const char *const init_db_usage[] = {
384 "git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [directory]",
389 * If you want to, you can share the DB area with any number of branches.
390 * That has advantages: you can save space by sharing all the SHA1 objects.
391 * On the other hand, it might just make lookup slower and messier. You
392 * be the judge. The default case is to have one DB per managed directory.
394 int cmd_init_db(int argc, const char **argv, const char *prefix)
397 const char *template_dir = NULL;
398 unsigned int flags = 0;
399 const struct option init_db_options[] = {
400 OPT_STRING(0, "template", &template_dir, "template-directory",
401 "provide the directory from which templates will be used"),
402 OPT_SET_INT(0, "bare", &is_bare_repository_cfg,
403 "create a bare repository", 1),
404 { OPTION_CALLBACK, 0, "shared", &init_shared_repository,
406 "specify that the git repository is to be shared amongst several users",
407 PARSE_OPT_OPTARG | PARSE_OPT_NONEG, shared_callback, 0},
408 OPT_BIT('q', "quiet", &flags, "be quiet", INIT_DB_QUIET),
412 argc = parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0);
417 if (chdir(argv[0]) < 0) {
421 * At this point we haven't read any configuration,
422 * and we know shared_repository should always be 0;
423 * but just in case we play safe.
425 saved = shared_repository;
426 shared_repository = 0;
427 switch (safe_create_leading_directories_const(argv[0])) {
432 die_errno("cannot mkdir %s", argv[0]);
437 shared_repository = saved;
438 if (mkdir(argv[0], 0777) < 0)
439 die_errno("cannot mkdir %s", argv[0]);
443 die_errno("cannot chdir to %s", argv[0]);
445 } else if (0 < argc) {
446 usage(init_db_usage[0]);
448 if (is_bare_repository_cfg == 1) {
449 static char git_dir[PATH_MAX+1];
451 setenv(GIT_DIR_ENVIRONMENT,
452 getcwd(git_dir, sizeof(git_dir)), 0);
455 if (init_shared_repository != -1)
456 shared_repository = init_shared_repository;
459 * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
460 * without --bare. Catch the error early.
462 git_dir = getenv(GIT_DIR_ENVIRONMENT);
463 if ((!git_dir || is_bare_repository_cfg == 1)
464 && getenv(GIT_WORK_TREE_ENVIRONMENT))
465 die("%s (or --work-tree=<directory>) not allowed without "
466 "specifying %s (or --git-dir=<directory>)",
467 GIT_WORK_TREE_ENVIRONMENT,
468 GIT_DIR_ENVIRONMENT);
471 * Set up the default .git directory contents
474 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
476 if (is_bare_repository_cfg < 0)
477 is_bare_repository_cfg = guess_repository_type(git_dir);
479 if (!is_bare_repository_cfg) {
481 const char *git_dir_parent = strrchr(git_dir, '/');
482 if (git_dir_parent) {
483 char *rel = xstrndup(git_dir, git_dir_parent - git_dir);
484 git_work_tree_cfg = xstrdup(make_absolute_path(rel));
488 if (!git_work_tree_cfg) {
489 git_work_tree_cfg = xcalloc(PATH_MAX, 1);
490 if (!getcwd(git_work_tree_cfg, PATH_MAX))
491 die_errno ("Cannot access current working directory");
493 if (access(get_git_work_tree(), X_OK))
494 die_errno ("Cannot access work tree '%s'",
495 get_git_work_tree());
498 set_git_dir(make_absolute_path(git_dir));
500 return init_db(template_dir, flags);